EP0665441A2 - Verfahren zum Lokalisieren des Ortes eines Fehlers auf einer Energieübertragungsleitung - Google Patents

Verfahren zum Lokalisieren des Ortes eines Fehlers auf einer Energieübertragungsleitung Download PDF

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Publication number
EP0665441A2
EP0665441A2 EP95300178A EP95300178A EP0665441A2 EP 0665441 A2 EP0665441 A2 EP 0665441A2 EP 95300178 A EP95300178 A EP 95300178A EP 95300178 A EP95300178 A EP 95300178A EP 0665441 A2 EP0665441 A2 EP 0665441A2
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European Patent Office
Prior art keywords
fault
impedance
assumed
line
network
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95300178A
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English (en)
French (fr)
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EP0665441A3 (de
Inventor
Allan Thomas Johns
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GE Power UK
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GEC Alsthom Ltd
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Filing date
Publication date
Application filed by GEC Alsthom Ltd filed Critical GEC Alsthom Ltd
Publication of EP0665441A2 publication Critical patent/EP0665441A2/de
Publication of EP0665441A3 publication Critical patent/EP0665441A3/de
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead

Definitions

  • This invention relates to a method of locating the position of a fault on a power transmission line, be it a single or multi-phase line.
  • the invention relates to a method of determining the form of impedance network at a fault on a multi-phase power transmission line.
  • fault location methods providing the required accuracy require measurements to be made at both ends, as opposed to only one end, of the line, and communicated to a single location. Such methods are more complicated, and hence more expensive, to implement than those that require measurements to be made at only one end.
  • a method of locating the position of a fault on a power transmission line between first and second ends of the line comprising: calculating the complex fault impedance at each of a plurality of assumed fault positions along the length of the line, the fault impedance at each assumed position being calculated utilising the measurement before and after fault occurrence of the voltage and current at said first end of the line, parameters of the line, and the impedance at said second end of the line; and selecting as the actual fault position the assumed fault position of said plurality of assumed fault positions for which the argument of the complex fault impedance most closely equals zero.
  • said step of calculating the complex fault impedance is carried out in respect of each complex impedance of each of a plurality of forms of fault network assumed to be at each of said plurality of assumed fault positions, each complex impedance of each network at each position being calculated utilising the measurement before and after fault occurrence in respect of each phase of the line of the voltage and current at said first end of the line, parameters of the line, and the impedance at said second end of the line; said method further comprises the step of analysing the variation of each complex impedance of each assumed fault network over said plurality of assumed fault positions to determine the assumed fault network for which the argument of each complex impedance most closely equals zero at the same assumed fault position of the plurality of assumed fault positions; and said step of selecting as the actual fault position comprises selecting as the actual fault position that same assumed fault position.
  • a method of determining the form of impedance network at a fault on a multi-phase power transmission line between first and second ends of the line comprising: calculating the complex impedances of each of a plurality of assumed forms of fault impedance network at each of a plurality of assumed fault positions along the length of the line, each complex impedance of each network at each position being calculated utilizing the measurement before and after fault occurrence in respect of each phase of the line of the voltage and current at said first end of the line, parameters of the line, and the impedance at said second end of the line; analysing the variation of each complex impedance of each asumed fault network over said plurality of assumed fault positons to determine the assumed fault network for which the argument of each complex impedance most closely equals zero at the same assumed fault position of the plurality of assumed fault positions; and selecting as the form of the actual fault impedance network the form of that determined assumed fault network.
  • Asingle-phase single-circuit double-end fed network of the form shown in Figure 2a) is taken as the overall unfaulted system model.
  • the source networks, at the local- and remote-ends, are represented by their thevenin equivalents and the line is represented by a lumped parameter model.
  • Applying a resistive fault to the Figure 2a) system at some distance, x from the local-end busbar, a faulted system model as shown in Figure 2b) is achieved.
  • a faulted system model as shown in Figure 3a
  • This process of decomposition is shown again, but in an alternative and more detailed form, in Figure 8. Note that the following new symbols have been introduced.
  • the pre-fault circuit is forced with the measured values for the pre-fault current at local-end busbar, Ipre, and the pre-fault voltage at local-end busbar, Vpre.
  • the pre-fault and post-fault current and voltages are the steady-state power-frequency voltage and current phasors, measured at the local-end busbar in the actual system before and after the fault, as illustrated in Figure 2.
  • the unknown fault resistance, Rf, in the superimposed circuit is replaced with a fault impedance, Zf.
  • the fault position is assumed at different positions, F', along the entire line length. That is the fault distance, x', is assumed for a range of values from zero up to the total line length, L.
  • the fault impedance, Zf is calculated. The foregoing is summarised in Figure 5.
  • the fault impedance Zf is calculated using steady-state analytical techniques as will now be explained.
  • the pre-fault and superimposed circuits used to calculate the fault impedance Zf are shown in Figures 9 and 10.
  • the former shows the actual circuits and the latter the equivalent two-port representation.
  • the calculation of the fault impedance Zf involves calculating the fault current If, the superimposed fault point voltage Vf, the pre-fault fault point voltage Vfss and the superimposed back injecting fault point generator driving voltage Ef. The calculation of these values and the subsequent calculation of the fault impedance Zf is as follows.
  • the pre-fault fault point voltage Vfss is found using the pre-fault circuit shown in Figure 9a). Considering the two-port representation of the pre-fault circuit in Figure 10a) and applying two-port network theory we can obtain the following equation:-
  • the superimposed back injecting fault point generator driving voltage Ef is equal and opposite to the pre-fault fault point voltage Vfss.
  • the actual fault distance x is identified as that assumed fault distance for which the argument of Zf equals (or tends towards) zero. This is based on the tested observation that only when the assumed fault position F' is at the actual fault position F does the calculated fault impedance Zf become a purely real (resistive) value.
  • the complete method, as given here, is summarised in Figure 6.
  • the method is the same as has been applied in the single-phase case, with the exception that the single fault impedance to be calculated has become a network of inter-phase and phase-to- earth fault impedances. Any one of these fault impedances can be calculated and its argument used to pinpoint the fault position.
  • the fault impedance network is not solvable for the general case, the fault type needs to be identified so that one of the fault impedances can be calculated correctly.
  • Identifying the fault type involves determining the form of the fault point network. To do this a range of fault networks are assumed and the fault impedances, assumed to be involved, calculated. The actual form of the fault network is identified by the calculated fault impedances, involved, sharing the same assumed fault distance at which their arguments tend towards zero. This is basically the same idea as has been employed in the fault location, except it is now applied to fault type identification.
  • Figure 7 illustrates this method of fault type identification, showing an actual fault point network, two assumed fault point networks, one correct the other incorrect, and the variation of the calculated fault impedance arguments with assumed fault distance for each assumed network.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Locating Faults (AREA)
EP95300178A 1994-01-26 1995-01-12 Verfahren zum Lokalisieren des Ortes eines Fehlers auf einer Energieübertragungsleitung. Withdrawn EP0665441A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9401467A GB2286088B (en) 1994-01-26 1994-01-26 A method of locating the position of a fault on a power transmission line
GB9401467 1994-01-26

Publications (2)

Publication Number Publication Date
EP0665441A2 true EP0665441A2 (de) 1995-08-02
EP0665441A3 EP0665441A3 (de) 1996-05-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95300178A Withdrawn EP0665441A3 (de) 1994-01-26 1995-01-12 Verfahren zum Lokalisieren des Ortes eines Fehlers auf einer Energieübertragungsleitung.

Country Status (6)

Country Link
US (1) US5825189A (de)
EP (1) EP0665441A3 (de)
AU (1) AU685887B2 (de)
CA (1) CA2140381A1 (de)
GB (1) GB2286088B (de)
ZA (1) ZA95370B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999032894A1 (en) * 1997-12-22 1999-07-01 Abb Ab Location of fault on series-compensated power transmission lines
EP1020729A3 (de) * 1999-01-13 2001-07-18 Alstom UK Limited Fehlererkennung an Versorgungsleitungen
EP3563162A4 (de) * 2016-12-30 2020-08-19 ABB Power Grids Switzerland AG Verfahren und steuerungssystem für fehlerphasendetektion

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DE19746200C2 (de) * 1997-10-18 2001-06-28 Beha C Gmbh Verfahren zur Bestimmung des Schleifenwiderstands eines Stromversorgungsnetzes
ATA194698A (de) * 1998-11-20 2001-11-15 Adaptive Regelsysteme Ges M B Verfahren zur bestimmung des erdschlussbehafteten abzweiges
US6256592B1 (en) * 1999-02-24 2001-07-03 Schweitzer Engineering Laboratories, Inc. Multi-ended fault location system
SE519943C2 (sv) * 2000-12-14 2003-04-29 Abb Ab Metod för fellokalisering i en transmissionlinje
US6476613B2 (en) * 2000-12-20 2002-11-05 Abb Ab Method of fault location in parallel transmission lines with series compensation
US6466030B2 (en) 2000-12-29 2002-10-15 Abb Power Automation Ltd. Systems and methods for locating faults on a transmission line with a single tapped load
US6466031B1 (en) 2000-12-29 2002-10-15 Abb Power Automation Ltd. Systems and methods for locating faults on a transmission line with multiple tapped loads
GB2375242A (en) * 2001-05-03 2002-11-06 Alstom Protecting a section of an electrical power line
US6879917B2 (en) * 2002-06-14 2005-04-12 Progress Energy Carolinas Inc. Double-ended distance-to-fault location system using time-synchronized positive-or negative-sequence quantities
AT413769B (de) * 2002-06-26 2006-05-15 Adaptive Regelsysteme Gmbh Verfahren zur bestimmung eines parameters eines elektrischen netzes
US7535233B2 (en) * 2004-07-15 2009-05-19 Cooper Technologies Company Traveling wave based relay protection
US20060152866A1 (en) * 2005-01-13 2006-07-13 Gabriel Benmouyal System for maintaining fault-type selection during an out-of-step condition
US7286963B2 (en) * 2005-12-30 2007-10-23 Abb Technology Ltd. Method and device for fault location on three terminal power line
US7638999B2 (en) * 2006-04-07 2009-12-29 Cooper Technologies Company Protective relay device, system and methods for Rogowski coil sensors
US20080125984A1 (en) * 2006-09-25 2008-05-29 Veselin Skendzic Spatially Assisted Fault Reporting Method, System and Apparatus
US7564233B2 (en) * 2006-11-06 2009-07-21 Cooper Technologies Company Shielded Rogowski coil assembly and methods
US7738221B2 (en) 2007-12-07 2010-06-15 Cooper Technologies Company Transformer inrush current detector
US8941387B2 (en) * 2010-10-12 2015-01-27 Howard University Apparatus and method for fault detection and location determination
GB201120477D0 (en) * 2011-11-28 2012-01-11 Univ Nottingham Fault location in power distribution systems
US10401417B2 (en) * 2013-02-13 2019-09-03 General Electric Technology Gmbh Electrical fault location determination in a distribution system based on phasor information
CA2932899C (en) * 2013-12-06 2019-06-18 Abb Inc. Systems and methods for identifying faulted segments in multiphase power networks
CN104376210A (zh) * 2014-11-17 2015-02-25 国网安徽省电力公司 基于ems单端量测的高压输电线路理论线损计算方法
CN104965156B (zh) * 2015-06-30 2018-02-09 昆明理工大学 一种利用极线故障电压进行pca聚类分析的故障选极方法
BR102015021673B1 (pt) * 2015-09-04 2022-07-05 Universidade Estadual De Campinas – Unicamp Método de proteção de distância para linhas de meio comprimento de onda e uso do mesmo
CN111937264B (zh) * 2018-03-31 2024-03-08 日立能源有限公司 用于在多终端电力传输系统中进行保护的方法和装置
US20220163582A1 (en) * 2019-03-26 2022-05-26 Nec Corporation Fault point locating apparatus, fault point locating system, fault point locating method, and non-transitory computer-readable medium
CN112269144A (zh) * 2020-10-14 2021-01-26 西安热工研究院有限公司 风力发电输电系统线路单相接地故障定位方法
CN115219846B (zh) * 2022-07-12 2025-11-21 广州地铁设计研究院股份有限公司 一种复线直供牵引网故障定位方法、电力仪表及介质
CN119291390B (zh) * 2024-12-02 2025-12-16 国网湖南省电力有限公司 一种考虑分布式电源接入的配电网故障区段定位方法及系统

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999032894A1 (en) * 1997-12-22 1999-07-01 Abb Ab Location of fault on series-compensated power transmission lines
US6529010B1 (en) 1997-12-22 2003-03-04 Abb Ab Location of fault on series-compensated power transmission lines
EP1020729A3 (de) * 1999-01-13 2001-07-18 Alstom UK Limited Fehlererkennung an Versorgungsleitungen
EP3563162A4 (de) * 2016-12-30 2020-08-19 ABB Power Grids Switzerland AG Verfahren und steuerungssystem für fehlerphasendetektion

Also Published As

Publication number Publication date
CA2140381A1 (en) 1995-07-27
GB2286088A (en) 1995-08-02
EP0665441A3 (de) 1996-05-15
AU1136795A (en) 1995-08-03
GB9401467D0 (en) 1994-03-23
GB2286088B (en) 1997-09-24
US5825189A (en) 1998-10-20
ZA95370B (en) 1995-09-21
AU685887B2 (en) 1998-01-29

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